On Friday, April 20, 2012 1:53:46 PM UTC+5:30, Brian Nesbitt wrote: 
>
> Hello folks, 
>
> Protobuf 2.4.1 fails to build using gcc 4.7.0 (on CentOS 6.2) with the 
> C++11 standard enabled (-std=c++11). The error is shown at the end. The fix 
> is simple though:
>
> *snip*
> --- protobuf-2.4.1/src/google/protobuf/compiler/command_line_interface.cc 
> 2012-04-19 
> 22:20:07.426070065 +0100
>  +++ protobuf-2.4.1/src/google/protobuf/compiler/command_line_interface.cc 
> 2012-04-19 
> 22:20:20.351925288 +0100
> @@ -910,7 +910,7 @@
>          cerr << disk_path << ": warning: directory does not exist." << 
> endl;
>        }
>  
> -      proto_path_.push_back(make_pair<string, string>(virtual_path, 
> disk_path));
> +      proto_path_.push_back(make_pair(virtual_path, disk_path));
>      }
>  
>    } else if (name == "-o" || name == "--descriptor_set_out") {
> *snip*
>
> Without this fix the error is:
>
>  libtool: compile:  g++-4.7.0 -DHAVE_CONFIG_H -I. -I.. -pthread -Wall 
> -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -O2 -std=c++11 -MT 
> plugin.lo -MD -MP -MF .deps/plugin.Tpo -c 
> google/protobuf/compiler/plugin.cc  -fPIC -DPIC -o .libs/plugin.o
> google/protobuf/compiler/command_line_interface.cc: In member function 
> ‘bool 
> google::protobuf::compiler::CommandLineInterface::InterpretArgument(const 
> string&, const string&)’:
> google/protobuf/compiler/command_line_interface.cc:913:78: error: no 
> matching function for call to ‘make_pair(std::string&, std::string&)’
> google/protobuf/compiler/command_line_interface.cc:913:78: note: candidate 
> is:
> In file included from 
> /opt/gcc-4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/bits/stl_algobase.h:65:0,
>                  from 
> /opt/gcc-4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/bits/char_traits.h:41,
>                  from 
> /opt/gcc-4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/string:42,
>                  from ./google/protobuf/stubs/common.h:41,
>                  from 
> ./google/protobuf/compiler/command_line_interface.h:41,
>                  from 
> google/protobuf/compiler/command_line_interface.cc:35:
> /opt/gcc-4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/bits/stl_pair.h:274:5:
>  
> note: template<class _T1, class _T2> constexpr std::pair<typename 
> std::__decay_and_strip<_T1>::__type, typename 
> std::__decay_and_strip<_T2>::__type> std::make_pair(_T1&&, _T2&&)
> /opt/gcc-4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/bits/stl_pair.h:274:5:
>  
> note:   template argument deduction/substitution failed:
> google/protobuf/compiler/command_line_interface.cc:913:78: note:   cannot 
> convert ‘virtual_path’ (type ‘std::string {aka std::basic_string<char>}’) 
> to type ‘std::basic_string<char>&&’
>
> Can we get this into the next release?
>
> Thanks.
>
>

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